CN114262118A - Wastewater treatment method for organic silicon resin production - Google Patents
Wastewater treatment method for organic silicon resin production Download PDFInfo
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- CN114262118A CN114262118A CN202111503204.3A CN202111503204A CN114262118A CN 114262118 A CN114262118 A CN 114262118A CN 202111503204 A CN202111503204 A CN 202111503204A CN 114262118 A CN114262118 A CN 114262118A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 19
- 239000010703 silicon Substances 0.000 title claims abstract description 19
- 229920005989 resin Polymers 0.000 title claims abstract description 18
- 239000011347 resin Substances 0.000 title claims abstract description 18
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 13
- 239000002351 wastewater Substances 0.000 claims abstract description 164
- 239000003921 oil Substances 0.000 claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000001914 filtration Methods 0.000 claims abstract description 37
- 239000013049 sediment Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000005057 refrigeration Methods 0.000 claims abstract description 7
- 239000002244 precipitate Substances 0.000 claims description 35
- 244000005700 microbiome Species 0.000 claims description 31
- 238000004659 sterilization and disinfection Methods 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 15
- 230000003647 oxidation Effects 0.000 claims description 13
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 238000001556 precipitation Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 13
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 12
- 238000005273 aeration Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 102000004190 Enzymes Human genes 0.000 claims description 11
- 108090000790 Enzymes Proteins 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 239000008394 flocculating agent Substances 0.000 claims description 11
- 239000005416 organic matter Substances 0.000 claims description 11
- 229920002401 polyacrylamide Polymers 0.000 claims description 11
- 229920002050 silicone resin Polymers 0.000 claims description 11
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 10
- 238000006864 oxidative decomposition reaction Methods 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000010865 sewage Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 7
- 230000000813 microbial effect Effects 0.000 claims description 7
- 239000002912 waste gas Substances 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 claims description 6
- 238000006731 degradation reaction Methods 0.000 claims description 6
- 238000005189 flocculation Methods 0.000 claims description 6
- 230000016615 flocculation Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 238000010979 pH adjustment Methods 0.000 claims description 6
- 102000004882 Lipase Human genes 0.000 claims description 5
- 108090001060 Lipase Proteins 0.000 claims description 5
- 239000004367 Lipase Substances 0.000 claims description 5
- 241000187654 Nocardia Species 0.000 claims description 5
- 125000000129 anionic group Chemical group 0.000 claims description 5
- 235000019421 lipase Nutrition 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 230000003311 flocculating effect Effects 0.000 claims description 4
- 241000427940 Fusarium solani Species 0.000 claims description 2
- 241000589516 Pseudomonas Species 0.000 claims description 2
- 241000223259 Trichoderma Species 0.000 claims description 2
- 125000002091 cationic group Chemical group 0.000 claims description 2
- 230000002378 acidificating effect Effects 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 125000000962 organic group Chemical group 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 230000029219 regulation of pH Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to the technical field of organic silicon resin production, in particular to a wastewater treatment method for organic silicon resin production, which comprises the following steps: a coarse filtration step: filtering suspended objects, sediment blocks and filiform objects in the wastewater by a grid machine to ensure that no obvious foreign matters exist in the wastewater, and classifying the filtered suspended objects, sediment blocks and filiform objects according to organic matters and inorganic matters; a low-temperature treatment step: introducing the filtered wastewater into a water pool in a refrigeration house for cooling and standing, so that oil and water in the wastewater are layered; oil removing step: separating the oil on the upper layer of the layered waste water, and pouring the oil into a heating kettle for heating to remove the water in the oil. The method has the advantages that the oil in the wastewater is layered with the water during standing by utilizing the low-temperature treatment step, and the oil is thickened by a low-temperature method and is more convenient to separate from the water, so that a large amount of oil in the wastewater is effectively removed.
Description
Technical Field
The invention relates to the technical field of organic silicon resin production, in particular to a wastewater treatment method for organic silicon resin production.
Background
The organic silicon resin is a general name of a polymer which is formed by alternately connecting silicon atoms and oxygen atoms to form a framework, different organic groups are connected with the silicon atoms, the organic silicon resin structure contains both organic groups and inorganic structures, the organic silicon resin integrates organic characteristics and inorganic functions by the special composition and molecular structure, a large amount of waste water is generated in the production process of the organic silicon resin, and a large amount of harmful substances exist in the waste water, so that the waste water needs to be treated before being discharged, and the environment pollution caused by the waste water is prevented.
Chinese patent No. 201610431540.4 discloses a method for treating organic silicon wastewater, which relates to the technical field of wastewater treatment. It comprises the following steps: adjusting the pH value of the wastewater to 7.0-8.5 by adding lime, and precipitating to remove most of condensable organic matters; adding one or two of NaOH and KOH into the supernatant after precipitation to adjust pH to above 11.5, heating to 60-80 deg.C, polymerizing the organosilicon monomer for 5-12 hr, and filtering; continuously adding acid into the filtered wastewater at 60-80 deg.C to control pH to 3.0-4.0, and adding ferrous iron and hydrogen peroxide for chemical oxidation treatment for 4-6 hr; adding lime into the obtained clear liquid to adjust pH value to 6.0-8.5, standing, discharging clear liquid after reaching standards, dehydrating precipitate, drying, and transporting outside.
In the prior art, oil in wastewater produced by silicone resin is not easy to remove, so that a large amount of oil in the wastewater pollutes the environment after the wastewater is discharged, and the acidic harmful substances in the wastewater are not thoroughly treated, so that river and underground water are polluted after the acidic substance wastewater is discharged, and therefore, a method for treating wastewater produced by silicone resin is urgently needed to solve the problems.
Disclosure of Invention
The invention aims to provide a wastewater treatment method for organic silicon resin production, which aims to solve the problem that oil and acidic substances in wastewater cannot be effectively removed in the background technology.
The technical scheme of the invention is as follows: a wastewater treatment method for organic silicon resin production comprises the following steps;
a coarse filtration step: filtering suspended objects, sediment blocks and filiform objects in the wastewater by a grid machine to ensure that no obvious foreign matters exist in the wastewater, and classifying the filtered suspended objects, sediment blocks and filiform objects according to organic matters and inorganic matters;
a low-temperature treatment step: introducing the filtered wastewater into a water pool in a refrigeration house for cooling and standing, so that oil and water in the wastewater are layered;
oil removing step: separating oil on the upper layer of the layered waste water, and pouring the oil into a heating kettle for heating to remove water in the oil;
and (3) pH adjustment: pouring the wastewater into a container, adding an alkaline agent into the wastewater, stirring to keep the pH value of the wastewater between 7 and 8, and filtering to remove sediment at the bottom of the container;
a heating step: burning the organic matter foreign matters separated in the coarse filtration step, so that the container is heated by the heat generated by burning, and the temperature is kept constant;
adding a microorganism: adding microorganisms and biological enzymes into the heated wastewater, and continuously introducing air into the wastewater to fully dissolve oxygen in the wastewater;
flocculation step: adding a flocculating agent into the wastewater subjected to microbial degradation and stirring to enable the wastewater to generate floccules;
a separation and precipitation step: filtering floccule precipitate generated in the sewage, airing the floccule precipitate, feeding the floccule precipitate into a heating step for combustion, and providing fuel for heating the wastewater;
an oxidative decomposition step: introducing the wastewater after the floccule precipitate is separated into an ozone reactor for oxidation, and conveying the wastewater into an aeration tank after the oxidation is finished;
a disinfection step: and introducing the wastewater in the aeration tank into a disinfection tank for disinfection treatment, and discharging after removing upper-layer suspended matters and bottom sediments.
Further, in the coarse filtering step, the filtered organic and inorganic substances are classified and then respectively dried in the air, and the dried inorganic substances are crushed and compressed.
Further, in the low-temperature treatment step, the temperature of the wastewater is 0-5 ℃, and the standing time is 3-5 h.
Further, in the oil removing step, the temperature inside the heating kettle is 150-200 ℃, and the oil in the heating kettle is heated and stirred at the same time.
Further, in the step of adjusting the PH, the alkaline agent is one or a combination of CaO powder and sodium hydroxide, and the bottom precipitate of the container is dried and then pulverized.
Further, in the heating step, waste gas generated by burning the organic matter foreign matter is introduced into the wastewater in the PH adjusting step, wherein the temperature of the wastewater is 30-50 ℃.
Further, in the step of adding the microorganism, the microorganism is one or more of nocardia, pseudomonas, fusarium solani and trichoderma lignicolum, and the biological enzyme is lipase.
Further, in the step of adding the microorganisms, the time for decomposing the microorganisms is 3.5 h-5h, and in the step of flocculating, the flocculating agent is one or more than two of anionic polyacrylamide, cationic polyacrylamide, nonionic polyacrylamide and zwitterionic polyacrylamide.
Further, in the separation and precipitation step, ash generated by combustion of the flocculent precipitate is poured into a container containing lime water, a mixture of the lime water and the ash is stirred, and the ash is buried after being precipitated, dried in the air and dried.
Further, in the step of oxidative decomposition, the flow rate of the wastewater passing through the ozone reactor is 0.3 to 0.8m3And/min, in the disinfection step, the suspended substance and the bottom sediment are dehydrated and then compressed and buried.
The invention provides a wastewater treatment method for organic silicon resin production by improvement, which has the following improvements and advantages compared with the prior art:
(1) according to the invention, the low-temperature treatment step is utilized, so that the oil in the wastewater is layered with the water when standing, and the oil is thickened by a low-temperature method, so that the oil and the water can be separated more conveniently, and further a large amount of oil in the wastewater can be effectively removed.
(2) According to the invention, the alkaline agent is added into the wastewater, so that acidic solutions such as hydrochloric acid, sulfuric acid and the like in the wastewater are neutralized, production precipitation is realized, the acidic value of the wastewater is further reduced, and the pollution to rivers and underground water after the wastewater is discharged is prevented.
(3) The invention utilizes the separated oil to heat and remove the water, so that the waste water can be heated to provide fuel through the separated oil, thereby realizing the effect of saving energy, and the waste gas generated by the oil is introduced into the alkaline sewage, so that the harmful substances in the waste gas are eliminated again, and the treatment of the harmful substances in the sewage is more thorough.
(4) The invention utilizes the ozone reactor to oxidize the wastewater, so that microorganisms and organic matters in the wastewater can be thoroughly decomposed again, thereby further realizing the effect of more thoroughly treating the wastewater produced by the organic silicon resin.
Drawings
The invention is further explained below with reference to the figures and examples.
FIG. 1 is a flow chart of wastewater treatment according to the present invention.
Detailed Description
The present invention will be described in detail with reference to fig. 1, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
A wastewater treatment method for organic silicon resin production comprises the following steps;
a coarse filtration step: filtering suspended objects, sediment blocks and filiform objects in the wastewater by a grid machine to ensure that no obvious foreign matters exist in the wastewater, and classifying the filtered suspended objects, sediment blocks and filiform objects according to organic matters and inorganic matters;
a low-temperature treatment step: introducing the filtered wastewater into a water pool in a refrigeration house for cooling and standing, so that oil and water in the wastewater are layered;
oil removing step: separating oil on the upper layer of the layered waste water, and pouring the oil into a heating kettle for heating to remove water in the oil;
and (3) pH adjustment: pouring the wastewater into a container, adding an alkaline agent into the wastewater, stirring to keep the pH value of the wastewater at 7, and filtering to remove sediments at the bottom of the container;
a heating step: burning the organic matter foreign matters separated in the coarse filtration step, so that the container is heated by the heat generated by burning, and the temperature is kept constant;
adding a microorganism: adding microorganisms and biological enzymes into the heated wastewater, and continuously introducing air into the wastewater to fully dissolve oxygen in the wastewater;
flocculation step: adding a flocculating agent into the wastewater subjected to microbial degradation and stirring to enable the wastewater to generate floccules;
a separation and precipitation step: filtering floccule precipitate generated in the sewage, airing the floccule precipitate, feeding the floccule precipitate into a heating step for combustion, and providing fuel for heating the wastewater;
an oxidative decomposition step: introducing the wastewater after the floccule precipitate is separated into an ozone reactor for oxidation, and conveying the wastewater into an aeration tank after the oxidation is finished;
a disinfection step: and introducing the wastewater in the aeration tank into a disinfection tank for disinfection treatment, and discharging after removing upper-layer suspended matters and bottom sediments.
Further, in the coarse filtering step, the filtered organic and inorganic substances are classified and then respectively dried in the sun, and the dried inorganic substances are pulverized and compressed.
Further, in the low-temperature treatment step, the temperature of the wastewater was 0 ℃ and the standing time was 3 hours.
Further, in the oil removing step, the temperature inside the heating kettle is 150 ℃, and the oil in the heating kettle is stirred while being heated.
Further, in the step of adjusting the pH, the alkaline agent is CaO powder, and precipitates at the bottom of the container are dried and then crushed.
Further, in the heating step, waste gas generated by burning the organic matter foreign matter is introduced into the wastewater in the pH adjusting step, and the temperature of the wastewater is 30 ℃.
Further, in the step of adding the microorganism, the microorganism is nocardia, and the biological enzyme is lipase.
Further, in the step of adding the microorganism, the time for decomposing the microorganism is 3.5 h, and in the step of flocculating, the flocculating agent is anionic polyacrylamide.
Further, in the separation and precipitation step, ash generated by combustion of the flocculent precipitate is poured into a container containing lime water, and a mixture of the lime water and the ash is stirred, and the ash is buried after being precipitated, dried in the air and dried.
Further, in the oxidative decomposition step, the flow rate of the wastewater passing through the ozone reactor was 0.3m3Min, in the disinfection step, the suspended matter and the bottom sediment are dehydrated and then compressed and buried.
Example two
A wastewater treatment method for organic silicon resin production comprises the following steps;
a coarse filtration step: filtering suspended objects, sediment blocks and filiform objects in the wastewater by a grid machine to ensure that no obvious foreign matters exist in the wastewater, and classifying the filtered suspended objects, sediment blocks and filiform objects according to organic matters and inorganic matters;
a low-temperature treatment step: introducing the filtered wastewater into a water pool in a refrigeration house for cooling and standing, so that oil and water in the wastewater are layered;
oil removing step: separating oil on the upper layer of the layered waste water, and pouring the oil into a heating kettle for heating to remove water in the oil;
and (3) pH adjustment: pouring the wastewater into a container, adding an alkaline agent into the wastewater, stirring to keep the pH value of the wastewater at 7, and filtering to remove sediments at the bottom of the container;
a heating step: burning the organic matter foreign matters separated in the coarse filtration step, so that the container is heated by the heat generated by burning, and the temperature is kept constant;
adding a microorganism: adding microorganisms and biological enzymes into the heated wastewater, and continuously introducing air into the wastewater to fully dissolve oxygen in the wastewater;
flocculation step: adding a flocculating agent into the wastewater subjected to microbial degradation and stirring to enable the wastewater to generate floccules;
a separation and precipitation step: filtering floccule precipitate generated in the sewage, airing the floccule precipitate, feeding the floccule precipitate into a heating step for combustion, and providing fuel for heating the wastewater;
an oxidative decomposition step: introducing the wastewater after the floccule precipitate is separated into an ozone reactor for oxidation, and conveying the wastewater into an aeration tank after the oxidation is finished;
a disinfection step: and introducing the wastewater in the aeration tank into a disinfection tank for disinfection treatment, and discharging after removing upper-layer suspended matters and bottom sediments.
Further, in the coarse filtering step, the filtered organic and inorganic substances are classified and then respectively dried in the sun, and the dried inorganic substances are pulverized and compressed.
Further, in the low-temperature treatment step, the temperature of the wastewater was 0 ℃ and the standing time was 3 hours.
Further, in the oil removing step, the temperature inside the heating kettle is 150 ℃, and the oil in the heating kettle is stirred while being heated.
Further, in the step of adjusting the pH, the alkaline agent is CaO powder, and precipitates at the bottom of the container are dried and then crushed.
Further, in the heating step, waste gas generated by burning the organic matter foreign matter is introduced into the wastewater in the pH adjusting step, and the temperature of the wastewater is 30 ℃.
Further, in the step of adding the microorganism, the microorganism is nocardia, and the biological enzyme is lipase.
Further, in the step of adding the microorganism, the time for decomposing the microorganism is 4 h, and in the step of flocculating, the flocculating agent is anionic polyacrylamide.
Further, in the separation and precipitation step, ash generated by combustion of the flocculent precipitate is poured into a container containing lime water, and a mixture of the lime water and the ash is stirred, and the ash is buried after being precipitated, dried in the air and dried.
Further, in the oxidative decomposition step, the flow rate of the wastewater passing through the ozone reactor was 0.3m3Min, in the disinfection step, the suspended matter and the bottom sediment are dehydrated and then compressed and buried.
EXAMPLE III
A wastewater treatment method for organic silicon resin production comprises the following steps;
a coarse filtration step: filtering suspended objects, precipitate blocks and filamentous objects in the wastewater by a grid machine to ensure that no obvious foreign matters exist in the wastewater, classifying the filtered suspended objects, precipitate blocks and filamentous objects according to organic matters and inorganic matters, then respectively airing the classified organic matters and inorganic matters, and crushing and compressing the aired inorganic matters;
a low-temperature treatment step: introducing the filtered wastewater into a water pool in a refrigeration house for cooling and standing, so that oil and water in the wastewater are layered, wherein the temperature of the wastewater is 0 ℃, and the standing time is 3 hours;
oil removing step: separating oil on the upper layer of the layered waste water, pouring the oil into a heating kettle for heating, removing water in the oil, wherein the temperature inside the heating kettle is 150 ℃, and the oil in the heating kettle is stirred while being heated;
and (3) pH adjustment: pouring the wastewater into a container, adding an alkaline agent into the wastewater, stirring to keep the pH value of the wastewater at 7, filtering and removing sediment at the bottom of the container, wherein the alkaline agent is CaO powder, and drying and crushing the sediment at the bottom of the container;
a heating step: burning the organic matter foreign matters separated in the coarse filtration step, heating a container by using heat generated by burning, keeping the temperature constant, and introducing waste gas generated by burning the organic matter foreign matters into wastewater in the PH regulation step, wherein the temperature of the wastewater is 30 ℃;
adding a microorganism: adding microorganisms and biological enzyme into the heated wastewater, and continuously introducing air into the wastewater to fully dissolve oxygen in the wastewater, wherein the microorganisms are nocardia, the biological enzyme is lipase, and the time for decomposing the microorganisms is 4.5 h;
flocculation step: adding a flocculating agent into the wastewater subjected to microbial degradation and stirring to enable the wastewater to generate floccules, wherein the flocculating agent is anionic polyacrylamide;
a separation and precipitation step: filtering flocculent precipitate generated in sewage, airing the flocculent precipitate, feeding the flocculent precipitate into a heating step for combustion, providing fuel for heating the wastewater, pouring ash generated by combustion of the flocculent precipitate into a container containing lime water, stirring a mixture of the lime water and the ash, precipitating the ash, airing the ash and burying the ash;
an oxidative decomposition step: introducing the wastewater after the floccule precipitate is separated into an ozone reactor for oxidation, and conveying the wastewater after the oxidation is finishedThe wastewater enters an aeration tank, and the flow of the wastewater passing through an ozone reactor is 0.3m3/min；
A disinfection step: and introducing the wastewater in the aeration tank into a disinfection tank for disinfection treatment, removing upper suspended matters and bottom sediments, then discharging, dehydrating the suspended matters and the bottom sediments, and then compressing and burying.
In the first, second and third examples, the time for microbial decomposition was 4.5 hours, and the conditions were the same, and the results of the third example were the best by comparing the organic content of the treated wastewater.
The working principle of the invention is as follows: a coarse filtration step: filtering suspended objects, sediment blocks and filiform objects in the wastewater by a grid machine to ensure that no obvious foreign matters exist in the wastewater, and classifying the filtered suspended objects, sediment blocks and filiform objects according to organic matters and inorganic matters; a low-temperature treatment step: introducing the filtered wastewater into a water pool in a refrigeration house for cooling and standing, so that oil and water in the wastewater are layered; oil removing step: separating oil on the upper layer of the layered waste water, and pouring the oil into a heating kettle for heating to remove water in the oil; and (3) pH adjustment: pouring the wastewater into a container, adding an alkaline agent into the wastewater, stirring to keep the pH value of the wastewater between 7, and filtering to remove sediments at the bottom of the container; a heating step: burning the organic matter foreign matters separated in the coarse filtration step, so that the container is heated by the heat generated by burning, and the temperature is kept constant; adding a microorganism: adding microorganisms and biological enzymes into the heated wastewater, and continuously introducing air into the wastewater to fully dissolve oxygen in the wastewater; flocculation step: adding a flocculating agent into the wastewater subjected to microbial degradation and stirring to enable the wastewater to generate floccules; a separation and precipitation step: filtering floccule precipitate generated in the sewage, airing the floccule precipitate, feeding the floccule precipitate into a heating step for combustion, and providing fuel for heating the wastewater; an oxidative decomposition step: introducing the wastewater after the floccule precipitate is separated into an ozone reactor for oxidation, and conveying the wastewater into an aeration tank after the oxidation is finished; a disinfection step: and introducing the wastewater in the aeration tank into a disinfection tank for disinfection treatment, and discharging after removing upper-layer suspended matters and bottom sediments.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A wastewater treatment method for organic silicon resin production is characterized by comprising the following steps: comprises the following steps;
a coarse filtration step: filtering suspended objects, sediment blocks and filiform objects in the wastewater by a grid machine to ensure that no obvious foreign matters exist in the wastewater, and classifying the filtered suspended objects, sediment blocks and filiform objects according to organic matters and inorganic matters;
a low-temperature treatment step: introducing the filtered wastewater into a water pool in a refrigeration house for cooling and standing, so that oil and water in the wastewater are layered;
oil removing step: separating oil on the upper layer of the layered waste water, and pouring the oil into a heating kettle for heating to remove water in the oil;
and (3) pH adjustment: pouring the wastewater into a container, adding an alkaline agent into the wastewater, stirring to keep the pH value of the wastewater between 7 and 8, and filtering to remove sediment at the bottom of the container;
a heating step: burning the organic matter foreign matters separated in the coarse filtration step, so that the container is heated by the heat generated by burning, and the temperature is kept constant;
adding a microorganism: adding microorganisms and biological enzymes into the heated wastewater, and continuously introducing air into the wastewater to fully dissolve oxygen in the wastewater;
flocculation step: adding a flocculating agent into the wastewater subjected to microbial degradation and stirring to enable the wastewater to generate floccules;
a separation and precipitation step: filtering floccule precipitate generated in the sewage, airing the floccule precipitate, feeding the floccule precipitate into a heating step for combustion, and providing fuel for heating the wastewater;
an oxidative decomposition step: introducing the wastewater after the floccule precipitate is separated into an ozone reactor for oxidation, and conveying the wastewater into an aeration tank after the oxidation is finished;
a disinfection step: and introducing the wastewater in the aeration tank into a disinfection tank for disinfection treatment, and discharging after removing upper-layer suspended matters and bottom sediments.
2. The method for treating wastewater generated in silicone resin production according to claim 1, wherein: in the coarse filtering step, the filtered organic matters and inorganic matters are classified and then respectively aired, and the aired inorganic matters are crushed and compressed.
3. The method for treating wastewater generated in silicone resin production according to claim 1, wherein: in the low-temperature treatment step, the temperature of the wastewater is 0-5 ℃, and the standing time is 3-5 h.
4. The method for treating wastewater generated in silicone resin production according to claim 1, wherein: in the oil removing step, the temperature in the heating kettle is 150-200 ℃, and the oil in the heating kettle is heated and stirred at the same time.
5. The method for treating wastewater generated in silicone resin production according to claim 1, wherein: in the step of adjusting the pH, the alkaline agent is one or a combination of two of CaO powder and sodium hydroxide, and precipitates at the bottom of the container are dried and then crushed.
6. The method for treating wastewater generated in silicone resin production according to claim 1, wherein: in the heating step, waste gas generated by burning the organic matter foreign matter is introduced into the wastewater in the PH adjusting step, and the temperature of the wastewater is 30-50 ℃.
7. The method for treating wastewater generated in silicone resin production according to claim 1, wherein: in the step of adding the microorganism, the microorganism is one or more of nocardia, pseudomonas, fusarium solani and trichoderma lignicoli, and the biological enzyme is lipase.
8. The method for treating wastewater generated in silicone resin production according to claim 1, wherein: in the step of adding the microorganism, the time for decomposing the microorganism is 3.5 h-5h, and in the step of flocculating, the flocculating agent is one or the combination of more than two of anionic polyacrylamide, cationic polyacrylamide, nonionic polyacrylamide and zwitterionic polyacrylamide.
9. The method for treating wastewater generated in silicone resin production according to claim 1, wherein: in the separation and precipitation step, ash generated by flocculent precipitation and combustion is poured into a container containing lime water, the mixture of the lime water and the ash is stirred, and the ash is precipitated, dried and buried.
10. The method for treating wastewater generated in silicone resin production according to claim 1, wherein: in the step of oxidative decomposition, the flow rate of the wastewater passing through the ozone reactor is 0.3-0.8m3And/min, in the disinfection step, the suspended substance and the bottom sediment are dehydrated and then compressed and buried.
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